HIWAY: A Highway Air Pollution Model

DESCRIPTION

The HYWAY model was developed by U.S. EPA for the evaluation of air pollution due to a motorway in flat terrain and for a given traffic condition (assumed to be equivalent to a linear pollution source). It is based on the gaussian plume approximation which is adapted to represent the pollution due to each lane, and corrected to account for low wind conditions.

HYWAY cannot deal with severe obstacles to the air flux (buildings, large tree areas) or with complex terrains.

Keywords

description: air quality, traffic pollution, gaussian plume
objectives: simulation
application: line sources, short term, short range, stationary conditions, pollutant from combustion, non reactive pollutant

SOFTWARE AVAILABILITY

      
         The model is part of UNAMAP and is available on magnetic tape from:      
             Computer Products       
             National Technical Information       
             Service U.S.Department Of commerce       
             Springfield, Virginia  22161,        
             Tel(703) 487- 4650.      
         

AUTHORS

      
            William B. Petersen      
            U.S. Environmental Protection Agency      
            Office of Research and Development      
            Research Triangle Park, NC 27711      
         

REFERENCES

• Noll, Miller, Clagget, "A comparison of three highway line source dispersion model" AE vol 12, pp1323- 1329, 1978;
• Kono, Ito, " A comparison of concentrations estimates by the OMG volume source dispersion model with three line source dispersion models" AE vol 24B, n 2, pp 253-260, 1990;
• Rao, Sistla, Keenan, Wilson, "An evaluation of some commonly used Highway dispersion model"; JACPA marzo vol 30. n 3 ,1980;
• Sistla, Sampson, Keenan, Rao, "A study of pollutant dispersion near highways" Atmospheric Enviroment vol 13, pp 669-685, 1989
• J.R.Zimmerman, R.S.Tomphson, "HIWAY: a Highway Air Pollution Model" Enviromental Protection Agency, North, Carolina, 1974
• J.R.Zimmerman, R.S.Tomphson, "User's guide for a Highway air pollution nodel", EPA -650/4-74- 008, 1975

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